Researchers Tie Telegram-Hosted STUFFF Stealer Log to 5,495 Compromised Endpoints

In March 2023, investigators tracking a Telegram channel known for trading infostealer output flagged a file labeled STUFFF. Inside sat 5,495 records pulled straight from infected machines: email addresses, plaintext passwords, and the URLs those credentials unlocked. The upload came with no clear attribution and no sanitization, which is why researchers have classified it as a fresh drop of live, usable data rather than recycled leak material.

Why This STUFFF Stealer Log Is Dangerous

Unlike a typical database breach where hashed passwords add friction for attackers, a stealer log contains exactly what was captured on a victim's device. The passwords are in plaintext, the URLs show where the credentials work, and in many cases session tokens ride along. Anyone who downloads the STUFFF file can attempt logins immediately, and Telegram distribution means the file spread within hours of being posted.

What Was Exposed in the STUFFF Telegram Upload

• 5,495 distinct credential records
• Email addresses tied to personal and corporate accounts
• Plaintext passwords with no hashing or encryption
• Target URLs showing which services each credential unlocks
• API host references indicating internal service access

Why This Matters

Stealer logs are the raw material for account takeover, business email compromise, and ransomware staging. Because the STUFFF dump includes URLs next to passwords, attackers do not need to guess where to try the credentials. If any of the 5,495 victims reused passwords across accounts, the blast radius extends far beyond what the file shows.

How a Stealer Log Like STUFFF Works

An infostealer such as RedLine, Raccoon, or Lumma is installed through a cracked game, a malicious ad, or a phishing attachment. Once running, it sweeps the browser for saved passwords, cookies, and autofill data, then uploads everything to an attacker-controlled server. Operators package the results into log files and post them on Telegram channels where brokers and fraud crews buy or trade them. STUFFF is one such file.

Check If You Are Affected

HEROIC indexes over 400 billion exposed records, including stealer logs distributed on Telegram. Search your email now to see whether it appears in the STUFFF dump or any related breach, and secure every affected account before attackers get there first.